title: Determination of proliferative activity in nasal polyps.
abstract: OBJECTIVE
  To determine the level of proliferative activity in 39 nasal polyps with clear cut distinct clinical behaviour patterns.
  
  
  METHODS
  The 39 nasal polyps included 11 polyps labelled as "single" and taken from the lateral nasal wall and the middle turbinate; 12 polyps labelled as "massive" and relating to diffuse polyposis involving the entire nasal cavity; six polyps labelled as "ASA" and relating to nasal polyps from patients with acetylsalicylic acid intolerance and asthma; and 10 polyps from cystic fibrosis related polyposis. Cell proliferation was determined by two independent methods: first, the computer assisted microscope analysis of isolated Feulgen stained nuclei for the measurement of the percentage of cells in the S phase of the cell cycle; and second, the immunohistochemical evaluation of a proliferation associated protein by means of the MIB 1 monoclonal antibody.
  
  
  RESULTS
  The cystic fibrosis related polyposis exhibited the highest proliferative activity of all the clinically identified nasal polyp groups. Acute inflammatory nasal polyps exhibited a higher cell proliferation than chronic ones. The results also show that while the immunohistochemical determination of cell proliferation by means of the MIB 1 monoclonal antibody is a valuable tool in determining cell proliferation in nasal polyps, the cytometrical image analysis of Feulgen stained nuclei is not useful for this purpose.
  
  
  CONCLUSIONS
  Cell proliferation activity identifies cystic fibrosis as being distinct from the other nasal polyp groups.
authors.affiliation: Service d'Oto-Rhino-Laryngologie, Cliniques Universitaires de l'Hôpital Erasme, Belgium.
authors.forename: S
authors.initials: S
authors.lastname: Hassid
authors.forename: M P
authors.initials: MP
authors.lastname: Degaute
authors.forename: S
authors.initials: S
authors.lastname: Dawance
authors.forename: K
authors.initials: K
authors.lastname: Rombaut
authors.forename: N
authors.initials: N
authors.lastname: Nagy
authors.forename: G
authors.initials: G
authors.lastname: Choufani
authors.forename: C
authors.initials: C
authors.lastname: Decaestecker
authors.forename: A
authors.initials: A
authors.lastname: Danguy
authors.forename: I
authors.initials: I
authors.lastname: Salmon
authors.forename: R
authors.initials: R
authors.lastname: Kiss
mesh_terms: D000208:Acute Disease; D000911:Antibodies, Monoclonal; D002455:Cell Division; D002908:Chronic Disease; D003550:Cystic Fibrosis / Q000150:complications; D006801:Humans; D009297:Nasal Mucosa / Q000473:pathology; D009298:Nasal Polyps / Q000209:etiology / Q000473:pathology*; D016196:S Phase
chemical_list: D000911:Antibodies, Monoclonal